Do I need squirrelmail for Outlook to work?

I had to disable squirrelmail in-order to get access to isp3 in browser. Do I need it to be enabled for Outlook to work? If so can you give me some ideas where to look for the problem? If not, then I am having another issue as Outlook will not setup to receive or send emails.

squirrelmail is not required to use email accounts with external mail clients like outlook or thudnerbird.

Btw, you dont have to disable squirrelmail to use ispconfig mail. I guess you just used a wrong alias for squirrelmail, the correct alias is /webmail while the wriong alias would be /mail. Edit the squirremail configuration file and set the alis to /webmail as described in the perfect setup guides.

This is what I had setup before and I have now reinstated squirrelmail and it is working without problems with isp3. But I am still unable to ping smtp.kustomhosting.net, I am not sure what is wrong and I am also unable to access webmail.kustomhosting.net And now my domains are going directly back to squirrelmail again, I disabled it again.

But I am still unable to ping smtp.kustomhosting.net, I am not sure what is wrong and I am also unable to access webmail.kustomhosting.net

Click to expand...

This is most likely adns problem and not related to email at all. Have you created dns A-Records for smtp.kustomhosting.net and webmail.kustomhosting.net that point to the IP address of your web server in the dns server that is authoritive for the zone kustomhosting.net

And now my domains are going directly back to squirrelmail again, I disabled it again.

Click to expand...

The reason for that is that you mixed IP address based vhosts with wildcard vhosts in apache. If you create a IP based vhostlke the one that you created in the squirrelmail configuration file, then all other vhsost on your server have to be ip based to. So you have to select the IP address and not * in all sites that you create in ispconfig.

Ok. I made some changes to postfix and finally got Outlook to setup without any errors buts when I send an email from another address to the one I setup in outlook and isp3 I get this error.

Code:

Delivery to the following recipient failed permanently:
admin@kustomhosting.net
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 554 554 5.7.1 <mail-gg0-f170.google.com[209.85.161.170]>: Client host rejected: Access denied (state 13).